Macy Corporation's relevant range of activity is 5100 units to 11,500 units. When it produces and sells 8300 units, its average costs per unit are as follows: Average Cost per Unit Direct materials $ 5.00 Direct labor $ 3.45 Variable manufacturing overhead $ 1.45 Fixed manufacturing overhead $ 3.80 Fixed selling expense $ 1.40 Fixed administrative expense $ 0.95 Sales commissions $ 1.35 Variable administrative expense $ 0.85 If the selling price is $27.00 per unit, the contribution margin per unit sold is closest to: